/Engine/Plugins/Experimental/Mutable/Source/CustomizableObjectEditor/Classes/MuCOE/Nodes/CustomizableObjectNode.h
The delegate requires the function being a UFUNCTION which requires all parameters to be UCLASS, USTRUC or UENUM.
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)() struct FPostEditChangePropertyDelegateParameters
FPropertyChange...
FPropertyChangedEvent
UObject*
Node